Z-discharge electron beam transport for Decade Quad

Summary form only given. The DTRA Decade Quad generator comprises four modules that collectively provide a large-area bremsstrahlung source. For small-area (large-dose) applications, it is necessary to compress the beam energy to an area at least four times smaller than that produced by the separate modules. This can be achieved by a combination of beam transport over roughly 30 cm, and either 2/spl times/ radial beam compression or beam overlap at the target. We are investigating two approaches to this problem: (1) grad-B-drift transport, followed by compression or overlap, and (2) radial beam compression using pinched-beam diodes followed by wall-confined, Z-discharge transport (ZDT) to the target. ZDT results are presented here.